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Identify the strong electrolytes from the following.

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Identify the strong electrolytes from the following.

(a) NaCl, CaCl

(b) Acetic acid, CaCl

(c) CaCl, citric acid

(d) Chromate

This question was addressed to me by my school principal while I was bunking the class.

This interesting question is from Electroplating Baths in chapter Electroplating of Engineering Chemistry II

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The correct answer is (a) NaCl, CaCl

Explanation: Since NaCl and CaCl dissociates completely in water (that is it gives the correct proportion of H+ and OH-  ions respectively) whereas acetic acid fails to do so.  Hence NaCl and CaCl are strong electrolytes.

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